A witch who is bored might do ANYTHING. People said things like 'we had to make our own amusements in those days' as if this signified some kind of moral worth, and perhaps it did, but the last thing you wanted a witch to do was get bored and start making her own amusements, because witches sometimes had famously erratic ideas about what was amusing.
Terry PratchettI think when people mean that Discworld books have become darker they really mean the series is growing up. In 'The Colour of Magic' most of the city is set alight. It's a joke, in much the same way that the Earth is destroyed almost at the start of Douglas Adams's 'The Hitchhikers Guide to the Galaxy.'
Terry PratchettLook at Satan. Created as an angel, grows up to be the Great Adversary. Hey, if you’re going to go on about genetics, you might as well say the kid will grow up to be an angel. After all, his father was really big in Heaven in the old days. Saying he’ll grow up to be a demon just because his dad became one is like saying a mouse with its tail cut off will give birth to tailless mice. No. Upbringing is everything. Take it from me.
Terry Pratchett